#!/bin/bash

GDAL_TILE_PROCESSES=16
GDAL_TILE_ZOOMS=8-14
GDAL_SAMPLING_WARP=cubic
GDAL_SAMPLING_TILE=antialias

# Create virtual dataset with coordinates
gdal_translate -of VRT -a_srs EPSG:4326 -outsize 300% 300% -gcp 639.0 714.0 25.5 56.333333333333336 -gcp 5424.0 744.0 26.166666666666668 56.333333333333336 -gcp 5439.0 5097.0 26.166666666666668 56 -gcp 618.0 5082.0 25.5 56 2_izdevums/40_Livani.jpg 40_Livani.vrt

# Add cutline to VRT
gdalwarp -r $GDAL_SAMPLING_WARP -tps -dstalpha -cutline_srs EPSG:4326 \
  -cutline "POLYGON(($(echo -e "639.0 714.0\n5424.0 744.0\n5439.0 5097.0\n618.0 5082.0" | \
  gdaltransform -tps -output_xy 40_Livani.vrt | \
  awk 'NR==1{first=$0} {printf "%s %s,", $1,$2} END{print " " first}')))" \
  40_Livani.vrt 40_Livani.cut.vrt

# Generate tiles
gdal2tiles.py -r $GDAL_SAMPLING_TILE --xyz -z $GDAL_TILE_ZOOMS -x --processes=$GDAL_TILE_PROCESSES 40_Livani.cut.vrt 40_Livani.xyz